Dynamo-electric machine.



B. A. BEHREND. DYNAMIC ELECTRIC MACHINE.

APPLIOATIOH FILED JUNE 5, 1905.

922,839. Patented May 25, 1909.

fnvenior M .Bernara'A -Bt ?/2rend.

Altar/a Min eases limited ivy two factors,

can He TEL 14 (i in proportion u is are suppressed. The questio 1S re: i soi 'ed my prepe'h BERN RI) Altliiilii BEHRENU i" PANY, A CORPORATEON 0i COMPANY, A CORPORATION I3 I 'E LESTER-Y wooi w the county oi Qhio, have mventee ce improvements in Dyi ot Will-Sh tue foiie .et specific: invention e COIlStlUCtlOH machines 0 and op ition of and p; he coust uction of direct c HTQIM) D As is We-1i iqic'mQtiie ou put oi 0 size of direct euri-eiit generator is the sp commutator and ti e heat {ie'veio ieii the ope u ion ot the machine.

and cc of the inuchine for nuwhine. The impi'oveu' mutating qualities, how entueiy (IEi'VQLi the eui'efui attention of aehiue ziesigners tor a long; tune. "i he primary causes of sparking ductiou of a, distorted main magnetic held by the cross iiehi produced Ly tiu ui'eiit 111 the ei'l'uatufe Winding, ui'id aiso the reversal of current in the eo'mmututeiii mumture coii. To co 'ieet the iiistoi-tiiiiu of the main 'i'iehi due to ui'iuutui'e reactions ithus been suggested to employ :1- COlnpd'lSzttiHg 1 ed that the current through same w ll he s11? tuntinlly equal to zm'i iii a direction opposite to the. direction of th' current in the niumt'ui'e conductors. alone has not prove entirely satisfe tor 40 for spm'kiess coiuiuumtinu. it has also heed I L n in order to reduce or entirely nemachine and fixing the suggested to produce it conceuti zit-ed revers magnetic iieid which increases in stiengi proportional y to the armature loud and to eemmutste he urine-tn re roiis it 1'1 flow of current in the short-circa the armature. Severn; attempts have made to eiieet this o placing smai. Wound poles between the 11min poles brushes un said small poles. ihese smell evuxiieii not com commutation poles, however} have into geue 'ei USBfOT various 1' esens, one femstance in eomiect en with a sLuit Wound WOOD 0111i), ASSIGNOH AFT) THEE i s to J 01-, te apahie which W1. "1) ariiiessiy. I

lie uizmhuie T '1 win r and it hei :he (let in.

4 1 cross u i UL e137 eliminated uni the machine he to operate s ;u'i-fi i I he iuientiou SL1 is of construction, of the 111m iii he. here mti t i' 'ihed an specifieuiiy iiiusflute the preferred eiuhodiiu i 6 1 Shaw ure s :i.

with 0011001 1e. :1 uni uteii coungeusi' greuiuiatic re is utution oi the connect-1m u hue; on a ser stuhle VH1 oi the. various u-(ij machine; and q is u diu it. 2, iiiustmtuie' the pieces 1.

members 13 nreiera minding are held in ings 12, are preferably made of magnetic material, but may, if desired, be made of nonmagnetic material. These auxiliary compensating windings 1 reduce concentrated reverse magnetic fie ds in line with the brushes l0 and reduce or entirely neutralize the current flowing in the short circuited armature coils, the current strength through said commutation 'windings being adjusted as will be explained later. Located be tween adjacent pole ieces are the bridging lily made of non-magnetic mater-is. The pole pieces 6 and 11 and said bridging members 13 are slotted at 141 1 rec'e 'n e the coils of ,ithe distributed compensating Winding 15. This compensating w nding may be arranged in any desired manner, depending upon the arrange? ment of the armature winding, butare preferabl so adjusted that their -ampereturns -equa the ampere turns of the armature winding. The coils of said compensating lace in said slots by the wedges 16, and are located as near as practicable to the eriphery of the armature. The distribute compensating Winding is connected in the circuit such a manner that the current through the coils is ins. direction opposite to the directionoi the current flowing through the armature conductors, thereby reducing or completely neutral izing the effect of the armature reaction. The combination of concentrated commutation Winding and the uniformly distributed compensating Winding as herein illustrated and described, aside from the current' strength adjusting features, produces a novel result quite different from the result obtained when only one of said spark reducing windings is employed.

in the diagram of connections, Fig. 2, the main field coil 7 is shown as connected-in series with the armature 8 and also with the winding 15 for compensating-the armature reaction and with the concentrated commutation winding 12. Each of said windings is shunted by an adjustable resistance, the main Winding 7 by resistance 17, the Winding 15 by resistance 18 and the winding 12 by resistance 19. it will thus be seen that any desired current strengthmay be obtaincd in each of said windings, so that just the proper edect rrry be obtained,

in Fig. 3 the main winding 7 a is connected in shunt to the armature instead of in series therewith, and the adjustable resistance 17 is connected in circuit with said Winding 7 The remainder of the circuit connections are the same as shown in Fig. 2. l

The compensating and commutation winding. may be connected in circuit in a Variety of ways, therefore in the appended claims I aim to cover all modifications of my invention which do not depart from its spirit and scope.

ceases 1. in a dynamo electric machine, an armas ture Winding, a main field Winding, a Winding for compensating armature reaction, a con-,-

centrated commutation Winding, the con1- pensat lng and commutation windings being connected in separate groups, and means for ad usting the current strength in the cornmutation winding independently of the current stren h in the other windings.

= 2. In a ynamo electric machine, an armature Winding, a main field windings distributed winding for compensating armaturereaction, a concentrated commutation Winding, means for. adjusting the current flowing through the-mainiield Winding, means for adjusting the current flowing through the compensating Winding, and means for ad- 'ustln the current fiOW'lIl throu hthe commutation winding.

3. in a dynamo-electric maclnne, an armsture, projecting main field pole-pieces, a main field Winding thereon, commutation pole-pieces located between the main polepieces, an auxiliary winding on said commuta ion poleieces, and a distributed compensatin Win rig surrounding said armsture, sai last twowindings being connected in separate groups.

d. In adynamo-electric machine, an armsture, projecting main field pole-pieces, a. main. field Winding thereon, commutation pole-pieces located between the main polepieces, an auxiliary winding on said commutation pole-pieces, a distributed compensat- .ing Winding surrounding said armature and artially supported by said pole-pieces, said -ast two windings being connected in separate groups, and bridging members of nonmagnetic material between said pole-pieces for supporting the intermediate portions of said compensating Winding.

5. in a dynamo-electric machine, an armature, projecting mainf'ield pole-pieces, a

main field windin thereon commutation pole-pieces located between the main polepicces, an auxiliary Winding on said commutation pole-pieces, a distributed compensating Winding surrounding said armature, said last two windings being connected inseparate groups, bridging members of non-magnetic material between said ole-pieces, the faces of said pole-pieces an said bridging members being slotted to receive the comthe coils of said Winding in position in said slots.

6. in a dynamo electric machine, an armature winding, a main field Winding, a distributed winding for compensating armature reaction, and a concentrated commutation winding, said last two windings being connected 1n separate groups, and means for ad- -ensatin Windin and means for holdin justing the strength of said coin ensating winding so that its ampere turns wil be equal to those of the armature winding.

7 In a dynamo-electric machine, an arma-- ture, main pole-pieces, a main field winding thereon, auxiliary pole-pieces, a commutation winding thereon, and a distributed compensating winding in slots in faces of said pole-pieces, said last two windings bein connected in separate groups.

8. In a dynamo-electric machine, an armature, main pole-pieces, a main field winding thereon, auxiliary pole-pieces, a commutation winding thereon, a distributed compensating winding in slots in the pole faces,- and separate means for adjusting the eiiect of each of said windings independently.

9. In a dynamo-electric machine, an armature, main pole-pieces, a main field winding thereon, auxiliary pole-pieces, a commutation winding thereon, bridges, of non-magnetic material connecting the inner ends of adjacent pole-pieces, and a distributed com -pensating winding in slots in the pole faces and the bridges, the commutation and compensating windings being connected in separate groups.

10. In a dynamo-electric machine, an armature, main pole-pieces, a niain frield winding thereon, auxiliary pole-pieces, "a commutation winding thereon, bridges of non-magnetic material between adjacent pole-pieces, a distributed compensating winding in slots in the pole faces and the bridges, and separate means for independently adjusting the current strength in each of said windings.

11. In a dynamo-electric machine, an armature, main pole-pieces which project into close proximity to the armature, a main field winding on said pole-pieces, auxiliary polepieces located between the main pole-pieces, a commutation winding on said auxiliary po1e-pieces, and a distributed compensating winding surrounding said armature, the commutation and compensating windings being connected in separate groups.

12. In a dynamo-electric machine, adjust.

able means for counteracting the effect of armature reaction, and separate means separately adjustable for reversing the direction of current in the armature coils undergoing commutation.

13. In a dynamoelectric machine of the commutator type, a field structure provided with a compensating and commutating winding, the commutating portions of the winding for the several poles of the machine being connected in a group and the remaining portions of the winding being connected in another group.-

14. In a dynamo-electric machine of the commutatortype, a field structure provided with a compensating and cominutating winding, the commutating portions of the winding for the several poles. of the machine being connected in series independently of the rest of the winding, and means for adjusting the relative amounts of current-flow through said commutating portions and the rest of the winding.

15. In a dynamo-electric machine of the commutator type, a field structure provided with a compensating and commutating wind ing, the commutating portions of the winding for the several poles of the machine being connected in a group and the remaining portions of the winding being connected in another group, and means for varying the relative amounts of current-flow through the two groups. I

16. In a dynamo-electric machine of the commutator type, a field structure provided with a compensating and commutating winding, the commutating portions of the winding for the several poles of the machine being connected in a group and the remaining portions of the winding being connected in another group, said groups being connected series, and ashunting resistance for adj usting the relative amounts of current-flow through. said groups.

17. In a dyna1no-electric machine of the commutator type, a lield provided with a compensating and commutating winding, the commutating portions of the winding for the several poles being connected in a grou g and the remaining portions of the winding eing connected. in another group, said groups being connected in series, and independent resistance-shunts for the two groups.

1S.-In a dynamo-electric machine of the commutator type, a field structure with a compensating and commutating winding, the commutating portions of the Winding for the several-poles being connected in a group and the remaining portions of the winding being connected in another group, said groups being connected in series, and two adjustable resistances shunting said groups respectively.

l 19. In a dynamo-electric machine,.an armature winding, a main field winding, a winding for compensating armature reaction, -a concentrated commutation winding, means for adjusting the current strength in said compensating winding, and separate means for adjusting the current strength in the other windings.

In testimony whereof I affix my signature, in the presence of two witnesses.

BERNARD ARTHUR BEHRENI). Witnesses:

LILLIA J. BRITTON, ELIZABETH 0. BR1TT0N.

Corrections in Letters Patent No. 922,839.

certified that in Letters Patent No. 922,839, granted May 25, 1909, upon Norwood, Ohio, for an improvement It is hereby the application of Bernard Arthur Behrend, of in Dynamo-Electric Machines,

errors appear in the printed specification requiring correction, as follows: In line 15, page 1, the Word of should read at, and in line 54, page 2 after the Word main, the word field should be inserted; and that the said Letters Patent should be read with these corrections therein that the sar'nemay conform to the record of the case in the Patent Office.

Signed and sealed this 22d day of June, A. 1)., 1909. [sEAL] O. C. BILLINGS,

Acting Commissioner of Patents. 

